JPS55125702A - Crystal oscillator of temperature compensation - Google Patents

Crystal oscillator of temperature compensation

Info

Publication number
JPS55125702A
JPS55125702A JP3481179A JP3481179A JPS55125702A JP S55125702 A JPS55125702 A JP S55125702A JP 3481179 A JP3481179 A JP 3481179A JP 3481179 A JP3481179 A JP 3481179A JP S55125702 A JPS55125702 A JP S55125702A
Authority
JP
Japan
Prior art keywords
temperature
crystal oscillator
circuit
capacitor
series
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP3481179A
Other languages
Japanese (ja)
Other versions
JPS641967B2 (en
Inventor
Takeshi Oshima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyo Communication Equipment Co Ltd
Original Assignee
Toyo Communication Equipment Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=12424589&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=JPS55125702(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Toyo Communication Equipment Co Ltd filed Critical Toyo Communication Equipment Co Ltd
Priority to JP3481179A priority Critical patent/JPS55125702A/en
Publication of JPS55125702A publication Critical patent/JPS55125702A/en
Publication of JPS641967B2 publication Critical patent/JPS641967B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To strongly improve the temperature versus frequency characteristics at the high temperature part, by inserting the temperature compensation circuit connecting capacitor in parallel with the series circuit of thermister and resistor, in series with the crystal oscillator.
CONSTITUTION: The temperature compensation circuit connecting the capacitor Cp in parallel with the series circuit of the resistors Rc and the thermister Rp is inserted to the crystal oscillator Y. The resistor Rc is of variable type so that the oscillation frequency at the reference temperature T0 can be in agreement with that at the temperature T2. Thus, the capacitance ratio at the manufacture of the crystal oscillator Y, variance in the capacitance between electrodes C0, and variance in the cut off angle can be compensated. Further, by selecting Cp, Rc so that the equivalent series capacitance of the parallel circuit of crystal Y is not more than 100PF, the temperature versus frequency characteristics at high temperature can be improved and the variable resistor Rc can be replaced to the diode and transistor TR. Further, a capacitor C5 is connected to the collector of TR of the oscillation circuit, output is picked up from this, allowing to make stable the output level to the temperature.
COPYRIGHT: (C)1980,JPO&Japio
JP3481179A 1979-03-23 1979-03-23 Crystal oscillator of temperature compensation Granted JPS55125702A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3481179A JPS55125702A (en) 1979-03-23 1979-03-23 Crystal oscillator of temperature compensation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3481179A JPS55125702A (en) 1979-03-23 1979-03-23 Crystal oscillator of temperature compensation

Publications (2)

Publication Number Publication Date
JPS55125702A true JPS55125702A (en) 1980-09-27
JPS641967B2 JPS641967B2 (en) 1989-01-13

Family

ID=12424589

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3481179A Granted JPS55125702A (en) 1979-03-23 1979-03-23 Crystal oscillator of temperature compensation

Country Status (1)

Country Link
JP (1) JPS55125702A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5473289A (en) * 1993-01-25 1995-12-05 Matsushita Electric Industrial Co., Ltd. Temperature compensated crystal oscillator
JP2019186883A (en) * 2018-04-17 2019-10-24 株式会社村田製作所 Temperature compensation crystal oscillator
CN113134155A (en) * 2021-04-06 2021-07-20 武汉光燚激光科技有限公司 Skin therapeutic instrument by transdermal diffusion

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5473289A (en) * 1993-01-25 1995-12-05 Matsushita Electric Industrial Co., Ltd. Temperature compensated crystal oscillator
JP2019186883A (en) * 2018-04-17 2019-10-24 株式会社村田製作所 Temperature compensation crystal oscillator
CN113134155A (en) * 2021-04-06 2021-07-20 武汉光燚激光科技有限公司 Skin therapeutic instrument by transdermal diffusion

Also Published As

Publication number Publication date
JPS641967B2 (en) 1989-01-13

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